75449551320 has 384 divisors, whose sum is σ = 293526192960. Its totient is φ = 16564654080.

The previous prime is 75449551313. The next prime is 75449551363. The reversal of 75449551320 is 2315594457.

75449551320 is a `hidden beast` number, since 7 + 5 + 44 + 95 + 513 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2714614 + ... + 2742266.

Almost surely, 2^75449551320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75449551320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146763096480).

75449551320 is an abundant number, since it is smaller than the sum of its proper divisors (218076641640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75449551320 is a wasteful number, since it uses less digits than its factorization.

75449551320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27747 (or 27740 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

It can be divided in two parts, 754495 and 51320, that added together give a triangular number (805815 = T₁₂₆₉).

The spelling of 75449551320 in words is "seventy-five billion, four hundred forty-nine million, five hundred fifty-one thousand, three hundred twenty".